Spring mortise-latch



(Model.)

I. A. HOLLENBEOK.

SPRING MO'RTISE LATCH. No. 357,084. Patented Feb. 1, 1887.

AT T E5T. NVENTUR- N. PETERS. pmunw 'a m, walhingkon. n c.

7 *UNIT STATES PATENT OFFICE.

FRANK A. HOLLENBEOK, OF SYRACUSE, NEW YORK.

SPRING MORTlSE-LATCH.

SPECIFICATION forming part of Letters Patent No.,357 ,084, datedFebruary 1, 1887.

Application filed June'ifi, 1866. Serial No. 205,603. (Modehl To allwhom it may concern:

Be it known that I, FRANK A. HOLLENBEOK,

a citizen of the United States, residing at Syracuse, in the county ofOnondaga and State of 5 New York, have invented certain new and usefulImprovements in Spring llIortise-Latches;

and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

In the accompanying drawings, Figure 1 is a front elevation of a latchembodying my invention. 3 is an elevation of the interior of the samelatched. Fig. 4 is a like view when unlatched, except that the parts lieupon the cover. Fig.

5 is a front elevation of tumbler. Fig. 6 is an elevation of same fromthe opposite side; Fig. 0 7, an edge elevation. Fig. 8 is a transversesection on line :0 x in Fig. 7; Fig. 9, a detail of one of the arms.

This invention relates to that class of mortise-latches constructed witha cylindrical or 5 tubular body, which are fitted into a door by boringthe mortise with a bit. My object is to simplify the construction,improve the durability and effectiveness, and cheapen the cost.

It is constructed as follows: A is the tubular body, constructed in twoparts, one of whichthe cover 1-is removable, and extends only up to theshoulder or neck of the other part, which is screw-threaded.

5 B is the bolt fitting through the face 2 of the latch in the usualmanner. This bolt is constructed withan ordinary beveled head, mountedupon a stem, 3, andupon this bolt I place a coiled spring, 4. The innerend of this stem is flattened, as at 5, and upon this part I pivotallymount two arms, 25, in such a manner that their pivotal axes will be inthe same horizontal plane. These are alike, each being constructed of abody provided with a hook, 6, at one end, and with a head, 7, at theother end, which is offset from the body of the arm, so that the headand body stand indiflerent but parallel vertical planes, the offset ineach being about equal to the thickness of the part 5 of the bolt B, sothat when the Fig. 2 is a top view thereof. Fig.

arms are mounted upon the bolt their bodies and hooks are in the samevertical plane.

Across the interior of the parts of the body I make in each a wall orweb, 8, in which I out a slot about one-half of the size of the stem 3of the bolt, and when the two parts are placed together these walls orwebs with their slots will coincide, and will loosely inclose and guidethe said stem in its movements forward an back.

0 is a tumbler consisting of a cylindrical metal construction, which isreduced at each end to form trunnions, and which has a polygonalaperture, 12, extending longitudinally through the same. This tumbler isprovided on its periphery midway of its length with projections 16 16,as shown, which engage with the hooks of arms 25. At one end of thetumbler. I place projections 14 14 upon the shoulder adjacent to thetrunnion. A projection, 17, is provided within the case A in the path ofprojections 14 14, so that when the tumbler is turned in eitherdirection its movement is arrested, as soon as the end of the bolt B iswithdrawn even with the face of the latch,

in the main body and one half in the cover.

By employing these slots I am permitted to make the body of my lock of avery small size, as the recess in which it is located can be and isusually enlarged about the axis'of rotation of the tumbler or spindle.

The operation of the latch will be clearly understood from the foregoingdescription.

What I claim, and desire to secure by Letters Patent, is-

1. The combination, with the tumbler having a projection on the oppositesides, of a latch-bolt provided with hook-arms extending on oppositesides of the tumbler, said arms being pivoted to the latch-bolt, thepivots of said arms being both in the same horizontal and verticalplanes, substantially as described.

2. The combination, with a tumbler having projections on opposite sides,of a latclrbolt provided with hook-arms extending on opposite sides ofthe tumbler, said arms being pivoted to the latch-bolt upon a singlepivot, substantially as described.

3. The combination, with a tubular latchbody provided with projection17, of a tumbler having shoulders 14 14 and projections 16 16, and abolt having arms extending on each side of the tumbler and engaging theprojections 16 16, whereby the movement of the bolt is arrested when itsouter end is drawn even with the face of the lock, substantially asdescribed.

4. The combination, with a tubular latchbody provided with slots 15 15,ofa tumbler having projections 16 16 and a bolt provided FRANK A.HOLLENBEGK.

In presence of- O. W. SMITH, E. S. COOKER.

